Zeolites

Q.

How Does Ion Exchange Method Remove Hardness Of Water?

Q. Beryl is an example for ____________ silicate

1. Pyro
2. Cyclic
3. Amphiboles
4. Ortho

Q.

How do you calculate electrolyte concentration ?

Q. To get the silicone $R_{3}Si–(OSi{R}_2{)}_n–Si{R}_3$ having 4 Si-O-Si linkage, the unit taken is:

1. 4 units of $R_{2}SiC{l}_2$ and 2 units of $R_{3}SiCl$
2. 2 units of $R_{2}SiC{l}_2$ and 2 units of $R_{3}SiCl$
3. 3 units of $R_{3}SiCl$ and 2 units of $R_{2}SiC{l}_2$
4. 3 units of $R_{2}SiC{l}_2$ and 2 units of $R_{3}SiCl$

Q.

If sodium chloride is heated in vapours of sodium, the colour changes because of

1. excess of sodium ions.

2. excess of chloride ions.

3. excess of salt.

4. electron trapped in anionic sites.

Q. Which of the following will give maximum type of cations in water? (1) KCL.MgCl2.6H2O(3) K4\lbrack Fe(CN)6\rbrack (2) K3\lbrack Fe(CN)6\rbrack (4) \lbrack Ag(CN)2\rbrack

Q. How much of sulphur is present in an organic compound if 0.53 gram compound give 1.158 gram of BaSo4 on analysis?

Q.

Quarternary ammonium salts of amines with acetates, chlorides and bromides as substrates are known as:

1. Non-ionic detergents

2. Inhibitors

3. Anionic detergents

4. Cationic detergents

Q.

A sample of water containing some dissolved sugar and table salt is passed through an organic ion exchange resins. the resulting water will be

1. Sweet

2. Tasteless

3. Bitter

4. Salty

Q. The chemical formula of zeolite is:

1. $K_{2}A{l}_{2}S{i}_2{O}_8.x{H}_{2}O$
2. $C{a}_{2}A{l}_{2}S{i}_2{O}_8$
3. $N{a}_{2}A{l}_{2}S{i}_2{O}_8.x{H}_{2}O$
4. $N{a}_2\left(N{a}_4{\left(P{O}_3\right)}_6\right)$

Q.

When zeolite, which is hydrated sodium aluminimum silicate is treated with hard water, the sodium iions are exchanged with which of the following ion(s)?
(a) $H^{+}$ ions (b) $M{g}^{2+}$ ions (c) $C{a}^{2+}$ ions (d) $S{O}_4^{2-}$

Q. Number of ions present in aqueous solution ofHCl is

Q.

An empty pan weighs $2.731Kg$ and $3.602Kg$ of potatoes are places in it. What is the combined weight $?$

Q. Zeolites are used for:

1. selective catalysis
2. adsorption
3. absorption
4. distillation

Q. When zeolite (hydrated sodium aluminium silicate) is treated with hard water, sodium ions are exchanged with:

1. $H^{+}$ ions
2. $C{a}^{2+}$ ions
3. $O{H}^{-}$ ions
4. $S{O}_4^{2-}$ ions

Q. Assertion :ZSM−5ZSM−5 is used as a catalyst in petrochemical industries. Reason: Zeolites are three-dimensional network silicates in which silicon atoms are replaced by aluminum atoms.

1. If both (A) and (R) are true and (R) is the correct explanation of (A).
2. If both (A) and (R) are true, but (R) is not the correct explanation of (A).
3. If (A) is correct, but (R) is incorrect.
4. If (A) and (R) are both incorrect.

Q. In paper industry, the chemical compound used for bleaching is :

1. potassium sulphite
2. calcium sulphate
3. calcium bisulfite
4. sulphuric acid

Q. Shape selective catalysts are so called because of :

1. the shape of the catalysts
2. the specificity of the catalysts
3. the size of the pores of the catalysts which can trap only selective molecules
4. their use for only some selected reactions

Q. Zeolites are a microporous catalyst. The general formula of a zeolite may be given as:

1. $M_{x/n}\left[\right(Al{O}_2{)}_x\left(Si{O}_2{)}_y\right].m{H}_{2}O$
2. $M\left[\right(Al{O}_2{)}_x].m{H}_{2}O$
3. $M_x\left[\right(Al{O}_2{)}_x\left(Si{O}_2{)}_y\right]$
4. $M_x\left[\right(Si{O}_2{)}_y].m{H}_{2}O$

Q. Calgon is an artificial zeolite for removing permanent hardness.

1. True
2. False

Q. The framework of zeolite is:

1. $Al-O-Si$
2. $Al-O-Al$
3. $Si-O-Si$
4. $Al-O-Na$

Q. The radius of $N{a}^6$ ion is 95 pm and that of Cl ions is 181'pm. Predict whether the Co-ordination number of $N{a}^4$ ion is 6 or 4.

Q. Assertion : Zeolites are the three-dimensional network silicates.
Reason: Negative charge on zeolite structure is neutralised by positively charged $A{l}^{3+}$ ions.

1. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.
2. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion.
3. Assertion is correct but Reason is incorrect.
4. Both Assertion and Reason are incorrect.

Q. A type of zeolite used to convert alcohols directly into gasoline is :

1. zeolite A
2. zeolite L
3. zeolite Beta
4. ZSM-5

Q. Which of the following statements is/are wrong?

1. Zeolites are hydrated aluminosilicates which can be used as shape-selective catalysts
2. Enzymes show maximum activity when pH is either very low or very high
3. Chemically, all enzymes are globular proteins
4. Enzymes shows increasing activity at room temperature $({20}^{o}C-{25}^{o}C)$.

Q. When an excess of aqueous KCN solution is added to an aqueous solution of copper sulphate, the complex $\left[Cu\right(CN{)}_4{]}^{2-}$ is formed. On passing $H_{2}S$ gas through this solution no precipitate of CuS is formed because:

1. sulphide ions cannot replace sulphate ions from copper sulphate solution
2. sulphide ions cannot replace $C{N}^{-}$ ions
3. $\left[Cu\right(CN{)}_4{]}^{2-}$ does not give $C{u}^{2+}$ ion in the solution
4. sulphide ions from $H_{2}S$ do not form complexes

Q. 3A solution contains Fe2, Fe3 and I ions. This solutionwas treated with iodine at 35^° C. E^° for Fe3 /Fe2+ is+0.77 V and E^° for I/21 =0.536 V. The favourableredox reaction is\lbrack AIPMT (Mains)-2011\rbrack

Q. The reagent(s) that can selectively precipitate $S^{2-}$ from a mixture of $S^{2-}$ and ${SO}_4^{2-}$ in aqueous solution is (are) :

1. $Ba{Cl}_2$
2. $Cu{Cl}_2$
3. ${Pb\left(OOC{CH}_3\right)}_2$
4. ${Na}_2\left[{Fe\left(CN\right)}_{5}NO\right]$

Q. $K_4\left[{Fe\left(CN\right)}_6\right]$ can be used to detect some ions out of ${Cd}^{2+},{Cu}^{2+},{Zn}^{2+},{Fe}^{3+},{Pb}^{2+}$ and ${Bi}^{3+}$. Excluded ions are :

1. ${Fe}^{3+},{Bi}^{3+},{Pb}^{2+}$
2. ${Cu}^{2+},{Zn}^{2+},{Bi}^{3+}$
3. ${Bi}^{3+},{Pb}^{2+}$
4. ${Fe}^{3+},{Pb}^{2+}$

Q. When zeolite is treated with hard water; there is exchange reaction between calcium/magnesium ion/and...........

1. aluminium ion.
2. sodium ion.
3. water of hydration.
4. sulphate ion.